Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The onset of May in Riverside notes an average high-temperature of a moderately hot 76.6°F (24.8°C), subtly shifted from April's 73°F (22.8°C). Compared to daytime temperatures, Riverside's temperature drops significantly, averaging a cool 54°F (12.2°C) during the nights of May.Humidity
May is the most humid month, with an average relative humidity of 56%.Rainfall
In Riverside, in May, it is raining for 4.4 days, with typically 0.2" (5mm) of accumulated precipitation. Throughout the year, there are 49 rainfall days, and 7.32" (186mm) of precipitation is accumulated.Snowfall
January, March through December are months without snowfall in Riverside.Daylight
In May, the average length of the day is 13h and 56min.On the first day of the month, sunrise is at 5:59 am and sunset at 7:33 pm. On the last day of May, sunrise is at 5:39 am and sunset at 7:55 pm PDT.
Sunshine
In May, the average sunshine is 11.3h.UV index
In May, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In May, a daily UV index of 6 turns into the following recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Riverside?
What is the most humid month in Riverside?
What is the average humidity in May in Riverside?
How much does it rain in Riverside in May?
When it does not snow in Riverside?
How many hours of daylight does Riverside have in May?
When is the sunrise / sunset in May in Riverside?
How many hours of sunshine does Riverside have in May?
How high is the UV index in May in Riverside?
Average temperature in May
Riverside, CA
- Average high temperature in May: 76.6°F
The warmest month (with the highest average high temperature) is August (91.2°F).
The month with the lowest average high temperature is December (63.3°F).
- Average low temperature in May: 54°F
The month with the highest average low temperature is August (66.4°F).
The coldest month (with the lowest average low temperature) is December (45.9°F).
Average pressure in May
Riverside, CA
- Average pressure in May: 29.9"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in May
Riverside, CA
- Average wind speed in May: 5.6mph
The windiest month (with the highest average wind speed) is May (5.6mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in May
Riverside, CA
- Average humidity in May: 56%
The month with the highest relative humidity is May (56%).
The month with the lowest relative humidity is August (43%).
Average rainfall in May
Riverside, CA
- Average rainfall in May: 0.2"
The wettest months (with the highest rainfall) are February and December (1.61").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in May
Riverside, CA
- Average rainfall days in May: 4.4 days
The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1.1 days).
Average snowfall days in May
Riverside, CA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in May /
Average sunshine in May
Riverside, CA
- Average daylight in May: 13h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in May: 11h and 2min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 48min).
Average sunshine days in May
Riverside, CA
- Average sunshine days in May: 24.9 days
The month with the most sunshine days is June (27.9 days).
The month with the least sunshine days is February (21.6 days).
Average UV index in May
Riverside, CA
- Average UV index in May: 6
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in May
Riverside, CA
- Average cloud cover in May: 16
The months with the most cloud cover are February and March (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in May
Riverside, CA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Riverside, California, USA
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